Table 2.
Relationships between Venezuelan isolates of soybean-nodulating bacteria and sampling sites, soil types, and tolerance levels of isolates to Al3+ 0.1–2 mM under acid conditions and 0–4% NaCl.
| Site (Ecosystem)a | Soil type (pH range) | Strain Code | Deduced genus and species based on 16S rRNA | Al3+mM at pH 4.5 showing good growth | NaCl % showing good growth |
|---|---|---|---|---|---|
| Aragua (V-WF) | Inceptisol (7.1~7.5) | VA11 | R. pusense | 0.5 | 2 |
| VA35 | R. tropici | 0.5 | 3 | ||
| VA1011-2A | B. japonicum | 1 | 2 | ||
| VA107A | R. pusense | 0.1 | 3 | ||
| VA107B | R. pusense | 0.1 | 3 | ||
| VA109-3B | B. japonicum | 0.5 | 3 | ||
|
| |||||
| VA312 | *P. fungorum | 0.1 | 0 | ||
| VA109-3 | *B. zhejiangensis | 1 | 4 | ||
| VA109-3A | *B. zhejiangensis | 1 | 3 | ||
|
| |||||
| Aragua (V-F) | Inceptisol (7.5~8.0) | VAF110B | R. alamii | 0.5 | 3 |
| VAF123A | B. lupini | 0.5 | 4 | ||
| VAF123B | B. lupini | 0 | 3 | ||
| VAF124 | R. pusense | 0.1 | 2 | ||
| VAF1243 | R. pusense | 1 | 3 | ||
| VAF125 | R. pusense | 1 | 4 | ||
| VAF1269 | B. lupini | 0.1 | 3 | ||
|
| |||||
| VAF32B | P. fungorum | 0.1 | 2 | ||
|
| |||||
| Amazonas (Am-r) | Oxisol (5.5~6.0) | VAm17A | R. tropici | 1 | 2 |
| VAm13A | B. elkanii | 0.5 | 3 | ||
|
| |||||
| VAm18B | *B. zhejiangensis | 1 | 3 | ||
| VAm22 | P. fungorum | 2 | 4 | ||
|
| |||||
| Anzoategui (S-NC) | Ultisol (8.0~10.0) | VAn112 | B. lupini | 0.1 | 0 |
| VAn113 | B. japonicum | 0.1 | 0 | ||
|
| |||||
| Apure (F) | Inceptisol (4.2~5.0) | VAp110 | *B. fungorum | 0.1 | 1 |
| VAp116 | *B. fungorum | 0.1 | 4 | ||
| VAp15 | *B. fungorum | 0.1 | 4 | ||
|
| |||||
| DC (N.P-C) | Alfisol (5.6~6.5) | VDC12 | *Burkholderia sp. | 1 | 4 |
| VDC15 | *B. zhejiangensis | 1 | 1 | ||
|
| |||||
| Falcon (A-D) | Aridisol (8.0~10.0) | VF23 | *Burkholderia sp. | 1 | 4 |
| VF24 | P. fungorum | 0.1 | 4 | ||
|
| |||||
| Guarico (S) | Vertisol (5.8~6.5) | VG10B | *Burkholderia sp. | 1 | 4 |
| VG7 | *Burkholderia sp. | 1 | 4 | ||
| VG9 | P. fungorum | 0.1 | 4 | ||
|
| |||||
| Lara (X-NS) | Vertisol (6.0~6.3) | VLa18 | R. pusense | 0.1 | 4 |
|
| |||||
| VLa19 | P. fungorum | 1 | 4 | ||
| VLa21 | P. phytofirmans | 0.1 | 2 | ||
| VLa31B | P. fungorum | 1 | 4 | ||
|
| |||||
| Miranda (M) | Alfisol (5.6~6.0) | VMi21 | *Burkholderia sp. | 2 | 3 |
|
| |||||
| Trujillo (A) | Ultisol (3.6~4.5) | VTr19-2B | R. alamii | 1 | 2 |
| VTr19A | R. alamii | 0.1 | 1 | ||
|
| |||||
| VTr19B | P fungorum | 0.1 | 3 | ||
| VTr28 | P. fungorum | 2 | 3 | ||
| VTr32 | P. fungorum | 0.1 | 4 | ||
| VTr35 | P. fungorum | 2 | 4 | ||
*
B.: Burkholderia. P.: Paraburkholderia. B.: Bradyrhizobium. R.: Rhizobium.
V-F: valley with fertilizer; S-NC: Xerophilic ecosystem near the coast; X-NS: xerophilic ecosystem nearest the savanna; V-WF: valley without fertilizer; Am-r: Amazon-rainforest; A-D: arid-like desert; A: Andes. N.P-C: National Park inside the city